Sectional boiler



w. R. STOCKWELL.

SECTIONAL BOILER. APPLICATION FILED AUGJS. 1917.

Patented Sept. 30, 1919.

2 SHEETS-SHEET 2 15 rave/whom #Q'llz'am 1? ,Jfovlz well VM') alto amaze I WILLIAM It. STOCKWELL, OF IRVINGTON, NEW YORK.

SECTIONAL BOILER.

Specification of Letters Patent.

, Application filed August 13, 1917. Serial No, 156,023.

T 0 aZZ whom it may concern.

Be it known that I, WILLIAM R. Sroon- WELL, a citizen of the United States, and resident of Irvington-on-Hudson, in the county of vVestchester, in the State of New York, have invented certain new and useful Improvements in Sectional Boilers, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of this specification.

This invention relates to sectional boilers, and, more particularly, to the type of heater illustrated and described in my Patent No. 1,128,823, of February 26, 1915, wherein is shown a sectional boiler having what is known as a back-and-forth fire travel. The boiler is divided into sections, there being a fire part section, a combustion chamber section, a combustion chambertop, as many intermediate sections as may be necessary to obtain the desired capacity ofboiler, and a dome ortop section. The combustion chamber is surrounded by a water jacket, while the sections above have hollow interiors for holding water in communication with the water jacket of the combustion chamber, and between each section is a horizontal space for the back-and-forth fire travel to the flue. The sections areconnected on opposite sides by tubular bosses, on the inside of which are push nipples, through which thecirculation of water between the sections is maintained- As it is important that the back-and-forth fire travel between the sections should be as little restricted as possible, it has been the practice to extend the tubular bosses outwardly beyond the outer walls of the sections, thus making a continuous line of outwardly extending bosses on each side of the boiler from the dome section down to and including the upper portion of the combustion chamber section, where they are tapered off and connected with the top of the water jacket of the latter section.

I have found that the cost of manufacture of the combustion chamber is increased at least 20% beyond what it' would be but for these outwardly extending bosses. I have also found that the bosses on'the sections above the combustion chamber proper may be retained so as to allow for the wide backand-forth fire travel and yet be eliminated from the outer wall of the combustion chamber by turning inwardly the bosses on the combustion chamber top, so as to make an inside connection with the water acket of the combustion chamber proper. WVhile this results in slightly narrowing the inside space of the combustion chamber it doesnot interfere with the, function of the latter. The obect of my invention, therefore, is. the improvement of this type ofv heater by providing a combustion chamber section that can be manufactured at a minimum of cost without loss of efficiency.

This invention relates to sectionalboilers, and, more particularly, to'the type of heater illustrated and described inmy Patent. No.

1,128,823, of Feb. 26,1915, wherein is shown a sectional boiler having what is known as a back-and-forth fire travel. Theboiler is divided into sections, there being a base section with an ash pit, a combustion-chamber section, a combustion-chamber top, as many fire travel between the sections. should be restricted as little as possible, it has been the practice to provide the sections with out' wardly extending portions of sufficient size to accommodate the sockets for the pushnipples, thus making a continuous line of these projections beyond the main portion of the outer wall, extending from the dome section down to and including the upper portion of the combustion chamber section, connecting with the top of the water-jacket of the latter section.

In my Patent No. 1,128,823 there is shown a removable combustion chamber top, and it is the object of the present invention to improve the type of boiler therein shown.

I have found that the cost of manufacture of the combustion chamber section is increased at least 20% beyond what it would be but for these outwardly extending portions providing sockets for the push-nipples. I have also found that the outwardly extending portions for such sockets may be Patented Sept. 30,1919.

retained on the sections above the combustion chamber section, so as to allow for the wide back-and-forth fire travel, and yet be eliminated from the combustion chamber section, by turning inwardly the connection with the water-jacket of the latter section. IVhile this results in narrowing the space of thecombustion chamber section, it does not interfere with the function of the latter.

My invention is illustrated in the accompanying drawings, in which Figure 1 is partly in elevation and partly in cross-section; Fig. 2 is a horizontal section on the line 22 Fig. 1; Fig. 3' is a vertical section on the line 3 3 Fig. l, the lower portion thereof being broken awa Fig. 1 is a view similar'to that shown in Fig. 1 but with an intermediate section added, and Fig. 5 is a section on the line 55 of Fig. 4:.

Referring to the drawings in detail, 1 represents the base section, 2 the ash pit, and 3 the grate bars. The combustionchamber section is indicated at 4-, having a fire box door at 5, awater jacket at 6, with a water connection at 6. Inward extensions of the upper portion of the water jacket 6 are .indicated at 6 to provide sockets 6 for pushnipples. The combustion chamber top 7, has a fine opening 8 and annular corrugations in its under side as at 9, and is provided with an open space 9 for the circulation of water. The wider side of the combustion chamber top is also provided with openings or sockets 9 to receive push-nipples, while the under side has outward extensions 9 to provide sockets 9 for push nipples. An intermediate section is indicated at 10, there being a fiueopening at 11 and top and bottom sockets 11 and 11 for push-nipples. Additional intermediate sections may be added to increase the heating capacity, as desired. A dome section is indicated at 12, having on its under side sockets 12 to accommodate push-nipples. Push-nipples 12 inserted in the sockets, establish water connection between the sections, the latter being held together by tie bolts, not shown in the drawings. The connections 13 lead to the pipe system of thebuilding, and the flue 14: of the domesection is connected to the usual smoke-box, not shown. The intermediate sections are provided with front clean-out doors 15, and rear clean-out doors 16.

As shown in my prior Patent No. 1,128,- 823, above referred to, the combustion chamber top is constructed so that it becomes reversible, making it possible to have the flue outlet at the rear of the boiler, no matter how many intermediate sections may be used. It will be observed that in Fig. 3 there is but one section between the combustion chamber top and the dome section, the flueopening in the combustion chamber top being in the rear. k intermediatesection has been added. In this Copies of this patent may be obtained for In Fig. 5 an additional different from the operation of the boiler shown and described in my said application No. 1,128,823, dated February 26, 1915; but the result is, that by the removal of the outwardly extended portions in the upper por tion of the combustion chamber, and reduc-.

ing the size of said section, I am enabled to effect a saving in the cost of manufacture amounting to at least 20%. This change in the combustion chamber does not interfere with its function in any manner, as the heating surface between the sections has not been curtailed and the efliciency of the boiler generally is as before. 5

IVhat I claim is; r

1. I11 a sectional boiler, the combination with a combustion chamber section the upper portion of which has a straight vertical outer wall and a water jacket therein, the upper portion of said water-jacket extending inwardly to provide a socket fora pushnipple, a removable combustion-chamber top having a v push-nipple socket on its wider side superposed and corresponding to the socket in the upper portion of the jacket of the combustion chamber, a nipple extending through both sockets, the combustion chamber top also having an outward extension in its upper portion and provided therein with a socket for a push nipple, and a push-nipple in said socket for establishing water connection with the upper sections.

2. In a sectional boiler, the combination with a combustion chamber section having a water-jacket, the upper portion of which section has a straight vertical outer wall, the upper portion of said water-jacket extending inwardly to provide a socket for a pushnipple, a removable combustion-chamber top having a push-nipple socket 011 its under side superposed and correspondin to the socket in the upper portion of the jac et of the com bustion-chamber section, the combustion- ILL AM R. sTooKwELL.

five cents each, by addressing the. Commissioner of Patents, Washington, D. C. 

